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In a hydro-electric power station, water falls through a 75 mpipe at the rate of 1500 kg s^-1 (kilograms per second) How many megawatts of electric power could be produced by the power plant ifit is 80% efficient?
a quarterback claims that he can throw the football a horizontal distance of 183 m 200 yd. furthermore he claims that
you have fixed costs of $608,000 per year. Your tax rate is 31 percent and your required return on this project is 11 percent. Illustrate what bid price per stamp should you submit?
At sea level, a pressure gauge on a closed rigid tank reads 30.0 psi. What is the gauge pressure (in psi) for the tank in the new place
A jet lands at 14.8 m/s, applying the brakes 2.19 s after landing. Find the acceleration needed to stop the jet within 5.89 102 m
an 80.0-n box is pulled 20.0 m up a 30 degree incline by an applied force of 100 n that points upwards parallel to the
A 600 turn solenoid is 15cm long. the current in it is 35A. a3.0cm long straight wire cuts through the center of the solenoid,along the diameter. the wires carries a 23A current downward. Whatis the magnitude of the force on this wire assuming the so..
occasionally an asteroid is broken up into smaller pieces or fragments. these fragments hurl through space and some of
A horizontal block-spring system with the block on a frictionless surface has total mechanical energy E = 42.3 J and a maximum displacement from equilibrium of 0.259 m, Find the potential energy stored in the spring when x = 0.160 m
On an unknown planet with radius 1000km a future astronaut drops a rock from his hand 2m off the ground. The rock takes 2s to reach the ground. What speed did the cannon launch the ball
There is evidence that elephants communicate via infrasound, generating rumbling vocalizations as low as 14 Hz that can travel up to 10 km. The intensity level of these sounds can reach 95 dB, measured a distance of 4.5 m from the source.
24.0g of copper pellets are removed from a 300 ? C oven and immediately dropped into 120mL of water at 24.0 ? C in an insulated cup. What will the new water temperature be
A uniform cylindrical turntable of radius 1.80 m and mass 25.2 kg rotates counterclockwise in a horizontal plane with an initial angular speed of 4pi rad/s. Find the final angular speed of the clay and turntable
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